1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test IsMethodCompilableTest
26 * @bug 8007270 8006683 8007288 8022832
27 * @library /testlibrary /testlibrary/whitebox /testlibrary/com/oracle/java/testlibrary
28 * @build IsMethodCompilableTest
29 * @run main ClassFileInstaller sun.hotspot.WhiteBox
30 * @run main ClassFileInstaller com.oracle.java.testlibrary.Platform
31 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:PerMethodRecompilationCutoff=3 -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* IsMethodCompilableTest
32 * @summary testing of WB::isMethodCompilable()
33 * @author igor.ignatyev@oracle.com
34 */
35
36 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
37 /**
38 * Value of {@code -XX:PerMethodRecompilationCutoff}
39 */
40 protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
41
42 static {
43 long tmp = Long.parseLong(
44 getVMOption("PerMethodRecompilationCutoff", "400"));
45 if (tmp == -1) {
46 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
47 } else {
48 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
49 }
50 }
51
52 public static void main(String[] args) throws Exception {
53 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
54 }
55
56 private IsMethodCompilableTest(TestCase testCase) {
57 super(testCase);
58 // to prevent inlining of #method
59 WHITE_BOX.testSetDontInlineMethod(method, true);
60 }
61
62 /**
63 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
64 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
65 * checks that WB::clearMethodState() clears no-compilable flags. Only
66 * applicable to c2 compiled methods.
67 *
68 * @throws Exception if one of the checks fails.
69 */
70 @Override
71 protected void test() throws Exception {
72
73 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
74 if (com.oracle.java.testlibrary.Platform.isClient()) {
75 return;
76 }
77
78 if (testCase.isOsr() && CompilerWhiteBoxTest.MODE.startsWith(
79 "compiled ")) {
80 System.err.printf("Warning: %s is not applicable in %s%n",
81 testCase.name(), CompilerWhiteBoxTest.MODE);
82 return;
83 }
84 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
85 throw new RuntimeException(method + " must be compilable");
86 }
87 System.out.println("PerMethodRecompilationCutoff = "
88 + PER_METHOD_RECOMPILATION_CUTOFF);
89 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
90 System.err.println(
91 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
92 return;
93 }
94
95 // deoptimize 'PerMethodRecompilationCutoff' times
96 for (long attempts = 0, successes = 0;
97 (successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
98 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
99 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
100 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
101 successes++;
102 }
103 }
104
105 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
106 // in osr test case count of deopt maybe more than iterations
107 throw new RuntimeException(method + " is not compilable after "
108 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
109 }
110
111 // Now compile once more
112 compileAndDeoptimize();
113
114 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
115 throw new RuntimeException(method + " is still compilable after "
116 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
117 }
118 checkNotCompiled();
119 compile();
120 waitBackgroundCompilation();
121 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
122
123 // WB.clearMethodState() must reset no-compilable flags
124 WHITE_BOX.clearMethodState(method);
125 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
126 throw new RuntimeException(method
127 + " is not compilable after clearMethodState()");
128 }
129 compile();
130 checkCompiled();
131 }
132
133 private int compileAndDeoptimize() throws Exception {
134 System.out.println("Compile");
135 compile();
136 waitBackgroundCompilation();
137 int compLevel = getCompLevel();
138 System.out.println("Deoptimize");
139 deoptimize();
140 return compLevel;
141 }
142 }